TM 5-3805-258-24-1T E S T I N G A N D A D J U S T I N GF U E L S Y S T E M15. Turn the crankshaft in a clockwise directionapproximately 45 degrees and then turn thecrankshaft in a counterclockwise directionto the top center mark that was made in Step14. If needed, adjust the dial indicator as inStep 10.16. Turn the crankshaft in a clockwise directionapproximately 45 degrees.17.6 V 2 0 2 3 F L O W C H E C K I N G A D A P T E R G R O UP9 . T u b e . 1 0 . C o n n e c t o r a s s e m b l y . 1 1 . F i t t i n g . 1 2 . S e a l-ing washer. 13. Adapter. 14. Locknut. 15. Pin. 16. Nut.18.19.Install 6V2023 Flow Checking Adapter Groupon No. 1 fuel injection pump. Use the proce-dure that follows to install the group.a.b.c.d.e.f.Turn fitting (11) out of adapter (13) until5.0 mm (.20 in.) of pin (15) can be seen.Put 6V2023 Flow Checking Adapter Groupon No. 1 fuel injection pump and tightennut (16) to 40 N·m (30 lb. ft.).Turn fitting (11) into adapter (13) untilpin (15) just makes contact with the reverseflow check valve in the fuel injection pumpbonnet. This is the point of first resistance.Turn the fitting into the adapter an addi-tional 1/4 turn.Move sealing washer (12) against the adap-ter. Tighten locknut (14) finger tight againstsealing washer (12).Tighten tube (9) to connector assembly(10) so that the end of tube (9) is in a posi-tion above horizontal and higher than theend on the connector assembly.Disconnect the fuel line at the fuel filter. Usean adapter to connect 5J4634 Hose Assembly(19) to the fuel filter base.Disconnect the fuel return line from the con-stant bleed valve. Put cap (17) on the constantbleed valve.F L O W C H E C K I N G A D A P T E R G R O U P I N S T A L L E D( T Y P I C A L E X A M P L E)C O N S T A N T B L E E D V A L VE( T Y P I C A L E X A M P L E)17. Cap.20. Put 1 gal. (4 liters) of clean fuel in the tankassembly. Move the governor lever to fullFUEL-ON position. Put 105 kPa (15 psi) ofair pressure in the tank. Use the hand pumpor shop air.CAUTIONIf shop air is used, make an adjustment to theregulator so the air pressure in the tank is amaximum of 105 kPa (15 psi).21.22.23.Put pan (18) under the end of tube (9) for thefuel that comes out of the tube.Turn the crankshaft, slow, in a counterclock-wise direction. Do this until the flow of fuelfrom the end of tube assembly (9) is 6 to 12drops per minute.Stop rotation of the crankshaft when the flowof fuel is 6 to 12 drops per minute. Take areading of the measurement on dial indicator(3).4-15
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